Spike.



S.`L. CLARK.

SPIKE.

APPLICATION FILED DEO.14, 1910. RBNEWED .TUNE 26, 1912.I

IIEL- i STARS FTN SPENCER L. CLARK, OF HALE,MIGHIGN.

SPIKE.

Speccation of -Letters Patent.

i,935,4ti9. Patented Ang.. i3, Application led December 14, 1910, Serial No. 597,325. Renewed .Tune 26, 1912. Seria No. EOQJE.

of the spike. Thelend yportion of sliding member is provided with a head, which, when the said member has been forced To all lwhom t may concern.'

Be it known that I, SPENCER L. CLARK, a citizen of the United States, residing at Hale, in thecounty of losco and State of Michigan, have invented certain new and useful improvements in Spikes, of which the following is a specification.

rihis invention relates to an improvement in driven headed fastening devices.

The primary object of this invention is to provide a. railway spike of the ordinary con-l` struction with pivotally arranged gripping members which may be actuated to engage the material' into which the spike hasoeen driven in order to hold the-spike against accidental displacement.

A further object of the invention is to so position and arrange the engaging members that they may be forced outofengagement when it is desired to withdraw the spike.

Inthe drawings: Figure 1 is a View showing the prongs in their open position, Fig. 2 a view showing the prongs in their closed position, Fig, 3 a section taken on the line Sie-Spf Fig. l, and Fig. 4l a detail perspective of one of the engaging prongs.

ln the drawings, 10 designates a railroad spike, o'ne side of which is provided with the dove-tail slot l1 in which is slidably mounted the sliding` member l2, the extreme end portion o said sliding movement loeing adapted to enter a recess 14 which forms a continuation of the slot l1, the portion of said spike lying between said recess and the termination of said slot'ibeing cutaway to receive the pivotally supported prongs l5, said prongsbeingsegiments whichx are 'pros' vided with sharpened end portions 15 which are adapted to bite into the tie when ila-nge being formed lby reducing the head of the spike. I f

in positioning the spike, the same 4is driven into the tie in the usual manner, the prongs resting parallel with the spike as the same is driven. The sliding member is new forced downwardly, the portions 19 forcing the segments into the tie at'right angles te the spike thus positively preventing the accidental displacement ofthe same'. ln rder to remove the spike, the sliding member is forced upward, the portiens i9 of said member restoring the prongs to their normal. position.

Particular attention is called to the peeuliar positioning of the sliding member and the manner in which the same engages the prongsto force the same' upwardly.,

What is claimed is:

A' driven headed asteningdevice consist ing of a spike, said spike being provided with a dove tail slot, a .member` slidahly tiled with a recess adaptedJ to receive thel end portion of said member, the portion or said spike lying rintermedi'ate said recess andsaid groove being cutaway, a plurality/2si1 pivot-ally .arranged spurs secured in saidgeut away portion, said sliding member bein r provided 'with cnt away portions adapted to oonorm'in shape to said spurs, the recipjroation of said sliding member being "adapted toactuate said spurs. er'

In testimony whereof laiiix my signature, in the presence of two witnesses.

4 the sliding member is forced downwardly. SENCERL. CLA( This sliding member is provided with 4cut Witnesses: away portions 16 so arranged as to allow- FRANK lnnnen, the pivoted segments tolie longitudinally W.

Copies of this patent may be obtained for five cents eeen,

"55' addressing tlf. 'ommissiener of'lat. Washington, D.

mounted in said .sint said s 'ike beine' nro- 3 Lb n downward, lies flush with the fianoe i7, said eri 

